The happy couple, who began dating in October 2015, got engaged in December in Rome.

Daughter Olympia was born Sept. 1.

(Instagram)

Williams announced the news on Reddit, which Ohanian founded.

“I came home / A little late / Someone had a bag packed for me /And a carriage awaited /Destination: Rome /To escort me to my very own “charming” / Back to where our stars first collided / And now it was full circle / At the same table we first met by chance / This time he made it not by chance /But by choice / Down on one knee / He said 4 words And r/isaidyes,” she wrote.

Williams and Ohanian put off their wedding until after the birth of their first child, Alexis Olympia Ohanian Jr., who arrived Sept. 1.